Simple module for 2.6 request?

Simple module for 2.6 request?

[lkml-2006i-ticket]

Hello,
it is not so easy to find online an *working* example of how to by hand
build a module.

gcc -o foo.c -ko foo.ko -DMODULE -D__KERNEL__
-I/usr/src/kernel-headers-directory/include/

with module license define macro

almost worked, but it misses thoes extra symbols created in
post-compilation.

How to add them by hand (not using all the big Makefiles normally
included in kernel tree)?

Like
some-command foo.ko foo.c
insmod foo.ko
done



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LimCore    C++ Software Architect / Team Lead
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limcore
software

Re: Simple module for 2.6 request?

[Oleg Verych]

> Hello,
> it is not so easy to find online an *working* example of how to by hand
> build a module.

Please find information on how to build (external) modules in
"Documentation/kbuild/modules.txt" directory of your linux source tree.
More (implementation) info can be found in the top Makefile.

> gcc -o foo.c -ko foo.ko -DMODULE -D__KERNEL__
> -I/usr/src/kernel-headers-directory/include/
>
> with module license define macro
>
> almost worked, but it misses thoes extra symbols created in
> post-compilation.
>
> How to add them by hand (not using all the big Makefiles normally
> included in kernel tree)?
>
> Like
> some-command foo.ko foo.c
> insmod foo.ko
> done
____

Re: Simple module for 2.6 request?

[Jan Engelhardt]

>how to by hand build a module.

Compilation has too many flags and too many steps to be reasonably done 
by hand. Unlike *cough* BSD or Solaris, the Linux kernel makefile system 
is designed to reasonably support external modules using all the 
necessary parameters the kernel you are compiling for needs. You know, I 
always get a shudder when I have to think of Solaris not having 
MODVERSIONS or even VERMAGIC -- it is dangerous because it allows you to 
build stuff that can fubar more easily.

>gcc -o foo.c -ko foo.ko -DMODULE -D__KERNEL__
>-I/usr/src/kernel-headers-directory/include/

gcc: unrecognized option '-ko'

>How to add them by hand (not using all the big Makefiles normally
>included in kernel tree)?

Who said they are big? Look at 
http://jengelh.hopto.org/f/oops_ko.tar.bz2 for a _really_ simple module.


	-`J'
--